An Acetic-Acid Type Climax Community and its Changes Aroused by COD/SO₄^2- Ratio in an Acidogenic Sulfate-Reducing Reactor

Abstract:

The objective of this study is to investigate the microbial community and its characteristics changes aroused by the ratios of COD/SO₄^2- in the acidogenic-phase reactor of two-phase anaerobic process. A continuous-flow lab-scale test was conducted in an acidogenic sulfate-reducing reactor with molasses wastewater as sole organic carbon source and sodium sulfate as the electron acceptor. The experimental results showed that Acetic-acid Type Microbial Metabolism resulted in the formation of An Acetic-acid Type Climax Community. The change of the COD/SO₄^2- ratio caused an ecological succession from a stable climax community at moderate and high COD/SO₄^2- ratios to a sub-stable climax community at a lower COD/SO₄^2- ratio. But Acetic-acid Type Microbial Metabolism kept unchanged during this course, which indicated the stability of Acetic-acid Type Climax Community. The Acetic-acid Type Microbial Metabolism and Acetic-acid Type Climax Community were of typical characteristics in the acidogenic sulfate-reducing reactor.

• Periodical: Applied Mechanics and Materials (Volume 108)
• Pages: 217-223
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.108.217
• Online since: October 2011
• Authors: Hong Xu Bao, Xi Ping Ma, Jian Wang, Kui Jing, Zhi Hui Chen, Ai Jie Wang
• Keywords: Acetic-Acid Type Climax Community, Acetic-Acid Type Microbial Metabolism, COD/SO₄^2- Ratio, Ecological Succession, Sulfate-Reducing Bacteria (SRB)

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